GET HIIT ON Strong Is SexyGET HIIT ON Strong Is Sexy 20min Intensity Focus: Tone. Heart Rate. Full body. 20min Intensity Focus: Tone. Heart Rate. Full body Get HIIT On from FitSphere First Confidence is sexy! FitSphere First video program’s most popular HIIT class with moves to tone the entire body. Let’s get our heart rate up and get sweaty! Buy this Episode Get FitSphere First Already have an account? Sign in.